NAME

       SoGLLineWidthElement -

       The SoGLLineWidthElement class changes the linewidth setting of the OpenGL render state.

       Requests from the scenegraph to change the linewidth when rendering OpenGL line primitives will be made
       through this element, which forwards it to the appropriate native OpenGL call.

SYNOPSIS

       #include <Inventor/elements/SoGLLineWidthElement.h>

       Inherits SoLineWidthElement.

   Public Member Functions
       virtual void init (SoState *state)
       virtual void push (SoState *state)
       virtual void pop (SoState *state, const SoElement *prevTopElement)

   Static Public Member Functions
       static SoType getClassTypeId (void)
       static int getClassStackIndex (void)
       static void * createInstance (void)
       static void initClass (void)

   Protected Member Functions
       virtual ~SoGLLineWidthElement ()
       virtual void setElt (float width)

   Additional Inherited Members

Detailed Description

       The SoGLLineWidthElement class changes the linewidth setting of the OpenGL render state.

       Requests from the scenegraph to change the linewidth when rendering OpenGL line primitives will be made
       through this element, which forwards it to the appropriate native OpenGL call.

       The Coin library does not place any bounds on the values of the linewidths, but be aware that the range
       and granularity of what is valid linewidths depends on the underlying OpenGL implementation. Application
       programmers using line primitives (typically through the SoLineSet or SoIndexedLineSet nodes) should heed
       these boundary values. They can be acquired by running the following code from within a valid OpenGL
       context:

       GLfloat bounds[2];
       glGetFloatv(GL_LINE_WIDTH_RANGE, bounds);
       GLfloat granularity[1];
       glGetFloatv(GL_LINE_WIDTH_GRANULARITY, granularity);

       Another, perhaps more convenient, way of acquiring the OpenGL implementation limits with regard to
       pointsizes is to use the So*GLWidget::getPointSizeLimits() method in the GUI 'glue' interface library you
       are using (SoQt, SoXt, SoGtk, SoWin, ...).

Constructor & Destructor Documentation

   SoGLLineWidthElement::~SoGLLineWidthElement (void) [protected],  [virtual]
       Destructor.

Member Function Documentation

   void * SoGLLineWidthElement::createInstance (void) [static]
       This API member is considered internal to the library, as it is not likely to be of interest to the
       application programmer.

   void SoGLLineWidthElement::init (SoState *state) [virtual]
       This function initializes the element type in the given SoState. It is called for the first element of
       each enabled element type in SoState objects.

       Reimplemented from SoLineWidthElement.

   void SoGLLineWidthElement::push (SoState *state) [virtual]
       This method is called every time a new element is required in one of the stacks. This happens when a
       writable element is requested, using SoState::getElement() or indirectly SoElement::getElement(), and the
       depth of the current element is less than the state depth.

       Override this method if your element needs to copy data from the previous top of stack. The push() method
       is called on the new element, and the previous element can be found using SoElement::getNextInStack().

       Reimplemented from SoElement.

   void SoGLLineWidthElement::pop (SoState *state, const SoElement *prevTopElement) [virtual]
       This method is callled when the state is popped, and the depth of the element is bigger than the current
       state depth. pop() is called on the new top of stack, and a pointer to the previous top of stack is
       passed in prevTopElement.

       Override this method if you need to copy some state information from the previous top of stack.

       Reimplemented from SoElement.

   void SoGLLineWidthElement::setElt (floatvalue) [protected],  [virtual]
       Set element value.

       Reimplemented from SoFloatElement.

Author

       Generated automatically by Doxygen for Coin from the source code.

Version 4.0.0a                                   Wed Feb 26 2014                         SoGLLineWidthElement(3)